Permeation Tubes as Calibrated Sources of Gas,
Abstract
Known low concentrations of gases are needed for toxicological studies, for calibration of instruments and for validation of analytical methods. Permeation tubes were developed as convenient sources. Liquefied gases such as sulfur dioxide, nitrogen dioxide, hydrocarbons and hydrogen sulfide are sealed in Teflon tubing and permeate through the walls for long periods at relatively constant rates of a few milligrams per day. The report discusses the use of these tubes in toxicology studies. Permeation tubes have been found to be simple, convenient and relatively constant sources for periods as long as a year. Although they have been applied mainly for calibration of instruments, by appropriate modifications they should be suitable for toxicological chamber work. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1970
- Accession Number
- AD0727516
Entities
People
- Bernard E. Saltzman
Organizations
- Air Force Research Laboratory